SIGABRT Error

This is most likely due to an error in linking one of ur IBOutlets. Make sure every outlet/delegate is properly hooked up! Delete any source that isn't being used.

Can you post your code?

I had the same problem anytime I clicked the Purchase button, even with its IBOutlet deleted. While I don't know why the error occurs, this fixed it for me:

Delete the IBOutlet tied to the purchase button, and close Xcode. Delete the Main.storyboard file from your working directory, and replace it with the original from the VendingMachineStarterFiles provided in the teachers note (the zipped file we all started with). Relaunch the project. Reconnect the Purchase button IBOutlet as directed.

Hi,

The problem is that you deleted the code (e.g.@IBAction) that links the purchase button to ViewController, but you haven't deleted the connection of this in the MainStoryboard yet. To solve this, go to MainStoryboard click the purchase button and on the right you may see more than one link which is the problem, so you need to delete unwanted link in the view controller.

I found that what caused the error for me was creating an out let with the sender argument and then deleting the sender argument, so there was a mismatch between the storyboard and the view controller.